fix(ci): drop duplicate ghcr.io prefix from image names (#726)

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: FelixTJDietrich

.github/workflows/build-and-push.yml

@@ -62,14 +62,15 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
+        # image must be bare (no registry prefix) — the reusable workflow below prepends it.
         include:
           - name: Webapp
             dockerfile: ./standalone/webapp/Dockerfile
-            image: ghcr.io/ls1intum/apollon/webapp
+            image: ls1intum/apollon/webapp
             context: .
           - name: Server
             dockerfile: ./standalone/server/Dockerfile
-            image: ghcr.io/ls1intum/apollon/server
+            image: ls1intum/apollon/server
             context: .
     uses: ls1intum/.github/.github/workflows/build-and-push-docker-image.yml@c8ede985ff7999c28d7538cb32ae52bfb83f51b9 # main
     with:

.github/workflows/deploy-prod.yml

@@ -51,7 +51,7 @@ jobs:
     with:
       environment: Production
       docker-compose-file: "./docker/compose.db.yml"
-      main-image-name: ghcr.io/ls1intum/apollon/server
+      main-image-name: ls1intum/apollon/server
       image-tag: ${{ inputs.image-tag }}
       deployment-base-path: "/opt/apollon/db"
     secrets: inherit
@@ -62,7 +62,7 @@ jobs:
     with:
       environment: Production
       docker-compose-file: "./docker/compose.proxy.yml"
-      main-image-name: ghcr.io/ls1intum/apollon/server
+      main-image-name: ls1intum/apollon/server
       image-tag: ${{ inputs.image-tag }}
       deployment-base-path: "/opt/apollon/proxy"
     secrets: inherit
@@ -73,7 +73,7 @@ jobs:
     with:
       environment: Production
       docker-compose-file: "./docker/compose.app.yml"
-      main-image-name: ghcr.io/ls1intum/apollon/server
+      main-image-name: ls1intum/apollon/server
       image-tag: ${{ inputs.image-tag }}
       deployment-base-path: "/opt/apollon/app"
     secrets: inherit

.github/workflows/deploy-staging.yml

@@ -51,7 +51,7 @@ jobs:
     with:
       environment: Staging
       docker-compose-file: "./docker/compose.db.yml"
-      main-image-name: ghcr.io/ls1intum/apollon/server
+      main-image-name: ls1intum/apollon/server
       image-tag: ${{ inputs.image-tag }}
       deployment-base-path: "/opt/apollon/db"
     secrets: inherit
@@ -62,7 +62,7 @@ jobs:
     with:
       environment: Staging
       docker-compose-file: "./docker/compose.proxy.yml"
-      main-image-name: ghcr.io/ls1intum/apollon/server
+      main-image-name: ls1intum/apollon/server
       image-tag: ${{ inputs.image-tag }}
       deployment-base-path: "/opt/apollon/proxy"
     secrets: inherit
@@ -73,7 +73,7 @@ jobs:
     with:
       environment: Staging
       docker-compose-file: "./docker/compose.app.yml"
-      main-image-name: ghcr.io/ls1intum/apollon/server
+      main-image-name: ls1intum/apollon/server
       image-tag: ${{ inputs.image-tag }}
       deployment-base-path: "/opt/apollon/app"
     secrets: inherit